/Engine/Source/Runtime/CoreUObject/Public/UObject/Object.h
Callback for retrieving a textual representation of natively serialized properties. Child classes should implement this method if they wish to have natively serialized property values included in things like diffcommandlet output.
true if property values were added to the map.
virtual bool GetNativePropertyValues ( [TMap](API\Runtime\Core\Containers\TMap)< [FString](API\Runtime\Core\Containers\FString), [FString](API\Runtime\Core\Containers\FString) > & out_PropertyValues, uint32 ExportFlags ) const